1.1.1.179	KCl	maximal activity at 1.5 M	
1.1.1.179	Mg2+	-	
1.1.1.179	MgCl2	maximal activity at 100 M	
1.1.1.179	NaCl	maximal activity at 1.5 M	
1.1.1.179	Zn2+	2 mol Zn2+ per monomer